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FAQs on Chapter 1: Introduction to Statistics - Class Notes, Math, CBSE - Class 10

1. What is statistics?
Ans. Statistics is a branch of mathematics that deals with collecting, analyzing, interpreting, presenting, and organizing data. It helps in making decisions based on data by using various statistical tools and methods.
2. Why is statistics important?
Ans. Statistics is essential in many fields such as science, economics, business, engineering, medicine, and social sciences. It helps in making informed decisions by providing insights into the data. Statistics also helps in identifying trends, patterns, and relationships between different variables.
3. What are the different types of data in statistics?
Ans. There are two types of data in statistics: qualitative and quantitative. Qualitative data is descriptive data that cannot be measured numerically, such as colors, names, or opinions. Quantitative data is numerical data that can be measured and analyzed, such as height, weight, or temperature.
4. What is the difference between descriptive and inferential statistics?
Ans. Descriptive statistics is the branch of statistics that deals with the collection, analysis, and presentation of data. It helps in summarizing and describing the data using measures such as mean, median, mode, and standard deviation. Inferential statistics, on the other hand, involves making predictions and inferences about a population based on a sample of data.
5. What is the importance of standard deviation in statistics?
Ans. Standard deviation is a measure of the variability or spread of data. It helps in understanding how closely the data is clustered around the mean. A small standard deviation indicates that the data points are close to the mean, while a large standard deviation indicates that the data points are spread out. Standard deviation is important in statistics as it helps in making decisions based on how consistent or varied the data is.
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